Photographic shutter.



PATENTED NOV. 22, 1904.

J. S. WRIGHT. HOTOGRAPHIG SHUTTER.-

.N0 MODEL.

PATBNTEDNOV. 22, 1904.

No. V75-,436.

J. S. WRIGHT. PHOTO-GRAPHIC SHUTTBR.

APPLICATION FILED DEO. 14. 1903.

No nomi..

Kill;

Y Ii. 4' J5 PATENTBD Nov. 22, 1904.

' J. s. WRIGHT.

PHOTOGRAPHIQ vSHUTTER.

APPLICATION FILED DEO.14. v1903.

4 SHEETS-SHEET 3.

NO MODEL.

Jaa' Mwave@ gw?? PATENTED NOV. 22, 1904.

J. s. WRIGHT. PHOTOGRAPHIG SHUTTBR.

APPLICATION FILED DEO. 14. 1903.

4 SHEETS-SHEET 4.

N0 MDEL.

UNITED STATES Patented November 22, 1904.

PATENT OFFICE.

JOHN S. IVRIGHT, OF DUXBURY, MASSACHUSETTS.

PHoToGRAPl-uo SHUTTER.

SPECIFICATION forming part of Letters Patent No. 775,436, dated November 22, 1904.

Application filed December 14, 1903. Serial No. 185,066. (No model.)

To all whom, t weary concern:

Be it known that I. JOHN S. WRIGHT; a citi- Zen of the United States, residing at DuX- bury, in the county of Plymouth and State of Massachusetts, have invented new and useful Improvements in Photographic Shutters, of which the following is a specification.

This invention relates to photographic shutters for cameras, and is an improvement upon the photographic shutter for which Letters Patent of the United States were granted to me April 28, 1903, No. 726,608. Like the photographic shutter illustrated and described in said Letters Patent, the device of this invention may be located either in front of the lens, between the glasses of a double lens, at

the rear of the lens, orin the focal plane of the lens of the camera. In the present case I have illustrated my invention as adapted to be placed at the rear of the camera and in the focal plane of the lens of the camera.

The object of the invention is to provide a photographic shutterfor cameras which may be used for instantaneous or time exposures and which may be used to take an instantaneous picture when the curtain is moving in either direction--up or down.

The object of the invention is, further, to provide means whereby the width of the slot in the curtain may be varied from the outside of the shutter-casing and the width indicated to a nicety by means of a dial-plate.

The invention consists in improved mechanism whereby the width of the slot is regulated and recorded by a dial, again in the improved mechanism whereby it is impossible to change the width of the curtain-slot until one of the spindles is locked to the casing, and again in the improved mechanism for setting the curtain for time exposures, all as hereinafter fully described in the specification, and particularly' set forth in the claims thereof.

Referring' to the drawings, Figure l is a rear, elevation of my improved photographic shutter, showing the parts in their relative positions when the curtain is wound upon the upper roll, the same being broken away to save space in the drawings and a portion of the casing shown in section ,at the right-hand side thereof. Fig. 2 is a side elevation of the same as viewed from the left of Fig. l. Fig. 3 is a side elevation of the same as viewed from the right of Fig. l. Fig. 4 is a section, partly in elevation, taken on line A A of Fig. 2 looking toward the left in said ligure, the same being partly broken away to save space. Fig. 5 is a section, partly in elevation, taken on line B B of Fig. 4 looking toward the left in said figure. Fig. 6 is a section, partly in elevation, taken on line C C of Fig. 1 looking toward the right in said figure. Fig. 7 is a detail section, partly in elevation, taken on line A A of Fig. 2,-with the clutch-slide drawn toward the left and the gear thrown in mesh with the dial-gear. Fig. 8 is a front elevation of the left-hand portion of my improved photographic shutter. Fig. 9 is a detail section illustrating the tape-winding reels, taken on line D D of Fig. 1 looking toward the left in said figure. Fig. 1() is a detail section, partly in elevation, taken on line E E of Fig. l looking toward the left in said figure and illustrating the manner in which the curtain is wound upon the curtain-rolls. Fig. 11 is a detail section, partly in elevation and broken away, taken on line F F, Fig. 2. Fig. 12 is a detail section, partly in elevation, taken on line G Gr of Fig. 2. Fig. 13 is a rear elevation, similar to Fig. 1, broken away to vsave space, illustratingI the curtain in position to have the Awidth of slot changed. Fig. 14 is a detail side elevation of the clutch-slide lock and the plate in which it slides. Fig. l5

is a detail section, partly in elevation, taken on line H H of Fig. 1 looking toward the left in said figure and illustrating the relative position of the upper intermittent gear and stop-gear. Fig. 16 is a detail section, taken on line I I of Fig. l, illustrating the lower intermittent gear and intermittent stop-gear. Fig. 17 is a detail plan of the 'clutch-slide.

Like numerals refer to like parts throughout the several views of the drawings.

The general construction and operation of the photographic shutter hereinbefore specically described is similar to the operation of the shutter shown and described in my Letters Patent hereinbefore referred to-that is, the curtain is a slotted curtainA and is fast at `sheet metal attached thereto.

CTI

opposite ends thereof, respectively, to two rotary rolls. The rolls are mounted upon a pair of rotary spindles, and each of said rolls is rotated by means of a torsional spring wound upon said spindle. There are means to lock each of said spindles to its respective roll and means to lock each of said spindles against rotation. The particular mechanism by which the lower roll is locked while the slot in the curtain is being adjusted to any desired width is different in the present device from that described in my Letters Patent referred to. The rotary dial is also a new feature in the present device. The manner of winding the springs in the upper and lower rolls and the means by which the lever connected to the upper and lower spindles for the purpose of imparting longitudinal motion to said spindles is operated is an entirely new departure in the present device. The mechanism by means of which the curtain is set for time exposure is also novel.

In the drawings, Q0 is a rectangular casing or frame, being, preferably, formed of wood and having an auxiliary casing 20 formed of The rolls and curtain are contained within the casing 20, while the mechanism for winding the rolls and for moving said rolls longitudinally thereof is contained within the auxiliary casing 20.

21 is a curtain made in two partsan upper part 22 and a lower part 23-said parts being separated frein eachother at their adjacent ends by a slot 24. The part 22 is fastened to a rotary roll 25, and the part 23 is fastened to a rotary roll i6.

The roll 25, Figs. l, 4, and l0, consists of a tube Q7, having an annular ring 28 fast to the left-hand end thereof and forming a head therefor, and at the right-liand end said tube has a disk 29 fastened thereto, said disk in -turn being fastened to a sleeve 30, which extends through one side of the casing 2O and has an intermittent pinion-gear 3l foi-ined upon its outer end. The intermittent pinion-gear 3l meshes into an intermittent stop-gear 32, io urnaled to rotate upon a screw 33, fast to the casing 20C The intermittent stop-gear 32 is provided with a stop-tooth 34, which serves to stop the rotation of the roll when the parts have rotated until said stop-tooth comes in contact with a stop-slide or with the periphery of said intermittent pinion-gear, as liereinafter described. iVithin the interior of the tube 2T, near the left-hand end thereof, is fastened a disk 3,5, said disk being journaled to rotate upon a spindle 36, said spindle in turn being journaled to rotate in the sleeve 30 at the right-hand end thereof, Fig. 4, and in a sleeve 3T, extending through the left-hand side of the casing in said figure. A torsional spiral spring 3S encircles the spindle 36 and is fast at one end to a collar 39, fast to the spindle 36, the other end of said spring being 5 fastened to the disk 35.

A clutch-disk 4t), fast to the spindle 2113, is provided with recesses 4l, adaliited to ei'igage a spring-pin 42 upon the disk 35, and thereby lock the spindle 36 to the disk 35 and tube 2T when the spindle is drawn toward the right from the position in which it is shown in Fig. 4. The spindle B6 has fastened to the righthand end thereof ay sleeve 43, and formed upon the periphery of said sleeve is a pinion-gear 43". A thumb-disk 43 is fast to the sleeve 43 outside the auxiliary casing Q9'. The sleeve 4? has fastened thereto a ratchet 44. and a pawl-lever 45, pivoted at 46 to the casing 21). engages said ratchet 4. The spring B8 is wound up by turning the gear43 toward the right, Fig. 5, in a manner hereinafter described, the ratchet and pawl locking the spindle against unwinding the spring when in the position shown in Fig.

The arm 47 of the pawl-lever 45 extends across one end of a pneumatic piston Said pneumatic piston is arranged to be reciprocated lengthwise of a cylinder 49 by air forced through a pipe 50 by means of a rubber tube and air-bulb in ainanner well known to those skilled in this art. Then the piston 48 is forced upwardly by the pressure of air, the arm 47 of the pawl-lever 45 is raised, disconnecting the other arm of said pawl-lever from the teeth of the ratchet 44 and allowing the spring 3S to unwind, rotating the upper roll 25 and winding the curtain thereon, as shown in Fig. 4.

The lower roll 26, Figs. 4, 7, 10, 11, and l2, consists of a tube 5l, and the right-hand end of said tube has a disk fast thereto, said f disk being' in turn fastened to a sleeve 53, which extends through one side of the casing 20 and has an intermittent pinion-gear 54 formed upon its outerend. The intermittent j pinion-gear 54 meshes into an intermittent i stop-gear 55, journaled to rotate upon a screw 56, fast to the casing 2W. The intermittent sto} )gear 55 is provided with a stop-tooth 5T, which serves to stop the rotation of the roll E26 when the parts are in the position shown in Fig. 5 and also when said tooth comes in contact with a stop-slide, as hereinafter described. Within the interior of the tube 51, near the left-hand end thereof, is fastened a l disk 58, said disk being' journaled to rotate upon a spindle 59, said spindle in turn being journaled to rotate in the sleeve at the right-hand end thereof, Fig. 4, and also in a cylindrical clutch-slide 60.

A torsional spiral spring (5l encircles the i spindle 59 and is fast at one end to a collar 62, fast to the spindle 59, the other end of said spring being fastened to the disk A clutcli-disk (33, fast to the spindle 59, is provided with recesses 64, adapted to engage a spi'ing-pin 65 upon the disk 58, and thereby lock the disk 58 to the spindle 59 and tube 51 when the spindle is drawn toward the right` L as shown in Fig.' 4. The spindle 59 has fas- TOO IIO

tened thereto, at the right-hand end thereof, a sleeve 66, provided upon its periphery with a pinion-gear 66, and outside the auxiliary casing 20/ a thumb-disk 66 is provided fast to said sleeve 66. A ratchet 67 is fast to the sleeve 66, and engaging said ratchet is a pawllever 68, pivoted at 69 to the casing 20. The spring 61 is wound up by rotating the piniongear 66" toward the left, Fig. 5, the ratchet and pawl locking the spindle against unwinding the spring when in the position shown in said Fig'. 5. The arm 70 of the pawl-lever 68 extends across one end of a pneumatic piston 71. Said pneumatic piston is arranged to be reciprocated lengthwise of the cylinder 49, fast to the casing 20', by air forced through the pipe 50 by means of a rubber tube and bulb, as hereinbefore described. When the piston 71 is forced downwardly by the pressure of the air, Fig. 5, the arm of the pawl-lever 68 is lowered, disconnecting the other arm of, said pawl-lever 68 from the teeth of the ratchet 67 and allowing the spring 61 to unwind, rotating the lower roll 26 and winding the curtain thereon, as hereinafter more fully described.

The spindles 36 and 59 are each movable longitudinally thereof for the purpose of bringing the clutch-disks 40 and 63, respectively, into and out of connection with the spring-pins 42 and 65, and thus connecting the spindle 36 to the tube 27 or disconnecting the same therefrom and connecting the spindle 59 to the tube 51 or disconnecting said -spindle from said tube. When the spindle 36 is locked to the tube 27, it is necessary in the operation of the shutter that the spindle 59 should be disconnected from the tube 51, and vice versa, and to insure this result a lever 72 is provided pivoted at 73 to the casing 20. One end of said lever is forked to straddle the sleeve 43 and bears against one side of the pinion-gear 43 and against one side of the ratchet 44. The other end of said lever is also forked and straddles the lever 66, bearing at the opposite sides thereof against the pinion-gear 66 and the ratchet 67 respectively. It will therefore be seen that when the lever 72 is rocked upon its pivot 73, as hereinafter described, the spindle 36 will be moved toward the right, while the spindle 59 will be moved toward the left, and vice versa. Near the upper end of the lever 72 is provided a stop 74, and near the lower end of said lever another stop, 75, is provided, said stops alternately being thrown into and out of line with the pneumatic pistons 48 and 71 as the lever 72 is rocked upon its pivot.

Wrhen the'lever 72 is in the position shown in Fig. 4, if the bulb is compressed the pneumatic piston 71 will move downwardly and disconnect the pawl-lever'68 from the ratchet 67, and the curtain will then be wound upon the upper roll, as shown in said figure, by the rotation of said roll25 and the unwindng of lthe spring 38. Yhen the lever 72 is rocked upon its pivot, as hereinafter described, the upper end of said lever moving toward the right and the lower end toward the left from the position shown in Fig'. 4, the lever is in such a position that the stop 75 will be in line with the pneumatic piston 71 and the stop 74 will be out of line with the pneumatic piston 48, and therefore upon operation of the bulb said pneumatic piston 48 will move upwardly, disconnecting the pawl lever 45 from the ratchet 44 and releasing the upper spindle 36, so that the curtain may be wound upon the lower roll 26 by the rotation of said roll and the unwinding of the spring 61.

The lever 72 is rocked upon its pivot by means of a slide 105, constructed to slide in ways 106, provided in the auxiliary casing 20. The slide 105 has a spindle 107 rotatably mounted thereon and terminating at its left-hand end, Fig. 4, in a rounded head 108 and pin 109. The pin 109 projects into a slot 110, formed in and extending longitudinally of the lever 72. A winding-gear 11 is fastened to the spindle 107, and when the slide 105 is raised to the position shown in Figs. 4 and 5 said winding-gear is constructed to mesh into the pinion-gear 43". The slide 105 is held upwardly in the position shown in Figs. 4 and 5 by a spring 112, and to the outer end of the spindle 107 is fastened a pivoted handle 113, by means of which said spindle is rotated outside the casing 20', and through the gear 111 and pinion-gear 43 the spindle l36 is rotated and the springI 38 is wound up. To wind up the spring 61, the upper end of the spring 112 is pushed inwardly by means of the knob 114, fast to the upper end thereof. The slide 105 is then moved downwardly until the upper side thereof passes beneath the lower end of the spring 112, which then snaps above said slide and holds it in position, the winding-gear 111 then being in mesh with the pinion-gear 66". By rotating the handle 113 it is evident that the spindle 59 through said gearing will be rotated and the spring 61 will be wound up.

The slide 105 in addition to serving as a means for carryingy the gear 111 into mesh with the pinion-gears 43/l and 66H serves as a means to rock the lever 72 upon its pivot 73, the head 108 of the spindle 107 being so arranged and constructed that when the slide 105 is moved downwardly from the position shown in Fig. 4 it will engage the right-hand edge IOO of the lever 72 at its lower end and push said lever toward the left in said figure, thus moving' the spindle 59 toward the left from the position shown in Fig. 4 and unlocking the roll 26 from the spindle, as hereinbefore described, while the upper spindle 36 will be thrown toward the right by the upper end of the lever 72 and the upper spindle and roll locked together, as hereinbefore described.. When the slide 105 is moved upwardly to the position shown in Figs. 3 and 5, then the head of the spindle engages the right-hand end of the lever 72, at the upper end thereof, and moves said lever into the position shown in Fig. 4, disconnecting' the upper spindle from its respec-tive roll and connecting' the lower spindle to its respective roll. lt will thus be seen thatI the slide 105 with the gear thereon serves as a means not only to rotate each of the spindles and wind up their respective springs, but also rocks the lever and brings the spindles into the proper position longitudinally with relation to their respective rolls, so that said spindles are locked to their respective rolls or unlocked therefrom, as the case may be, at the proper time ifor the winding of the springs.

The operation of the mechanism hereinbefore specilically described is substantially the same as the operation of the shutter illustrated and described in said Letters Patent, with the exception that the lever T2 is rocked upon its pivot by moving' the slide 105 upwardly or downwardly, as hereinbe'fore described. Brieiiy, this operation is as follows: Assum ing' the springs 38 and 61 to be wound up and the curtain wound upon the upper roll, the slide 105 is moved downwardly by means of the handle 113 until the g'ear 111 meshes into i the g'ear 66. This movement of the slide pushes the lower spindle toward the le'ft and the upper spindle toward the right, locks the upper spindle to the upper roll, and unlocks the lower spindle from the lower roll. The air-bulb being pressed forces the piston 48 upwardly, disengages the pawl 45 from the ratchet 44, and allows the curtain to be wound upon the lowei` roll by the unwinding of the spring' 61. The springs when wound up are of sufficient capacity to allow the curtain to be moved upwardly and downwardly fou r times without perceptible diminution of tension. 1f desired, the springs may be kept constantly wound up to their full extent by rotating' the handle 113 every time that it is moved upwardly or downwardly. It will thus be seen and understood that by means of my improved mechanism the curtain may be actuated in opposite directions, each time making an exposure by means of the slot therein. The manner of adjusting the width of the slot 24 to different distances and recording the width of said slot by means of a rotary dial is illustrated in Figs. 1, 2, 3, 4, 5, 6, 'T 9, 10, 11, and 12.

Assuming the curtain 21 to be wound upon the upper roll 25, as illustrated in Figs. 4 and 10, and the springs upon both of the spindles 36 and 59 wound up, the different parts being in the relative positions illustrated in Fig. 4, it will be seen that the clutch-disk 63 is in connection with the spring-pin 65 when the lower roll and spindle are locked together. Now upon rotating' the lower thumb-disk 66 toward the left, Fig. 3, the curtain 21 will be partly wound from the upper roll onto the lower roll into the position shown in Fig'. 13, bringing the slot 24 away from the upper roll` as shown in Yfull lines in said ligure, and rotating' the intermittent pinion-g'ear 54 toward the left in the direction of the arrow n, Fig'. 3, until the tooth upon said intermittent pinion-gear describes practically a complete rotation and engaging' the intermittent stopg'ear 55 rotates said stop-gear in the direction of the arrow Fig. 3, until a hole T6 in said intermittent stop-gear comes in line with a locking-rod '77, whereupon said locking-rod will be forced into said hole by a spiral compression-spring' 116, Figs. 11 and 12, and thus the lower roll 26 will be locked in position against rotation by means of said locking-rod, intermittent stop-gear 55, and intermittent pinion-gear 54, it being' understood that said intermittent pinion-gear is fast to or integral with the sleeve 53, the sleeve 5:) being' fast to the disk and the disk being' fastened by a screw to the tube 51, as shown in Fig'. 4.

The locking-rod T7 is constructed to slide in the opposite sides of the casing 2O and has Vfast thereto a collar117, one end of the spring' 116 bearing against said collar, the other end of said spring' bearing' against a plate 116, fast to the camera-casing'. The rod 77 is held against the action of the spring' 116 and out of enga-gement with the intermittent gear by means of a slide 134, having an incline 135 thereon, Figs. 2, 7,V and 11. Then said slide is in the position illustrated in Fig'. 11, the rod 77 is prevented from moving' toward the right by a collar 136, Vfast to said rod and bearing' against the left-hand side of the slide 134. Wfhen the slide 134 is pushed downwardly, as shown in Fig'. T, the collar 136 rides down upon the incline 135, the spring' 116 carrying' said collar and the rod TT toward the right, as hereinbefore described.

It will be understood that the lower roll 26 is now locked to the casing 2O and that the lower part 23 of the curtain 21 is fastened to said lower roll. To increase the width of the slot between the lower part 23 and the upper part 22 of the curtain 21,1 provide means whereby the upper part of the curtain is drawn away from said lower part 23, and also in order to decrease' the width of the slot said means operates to draw the part 22 toward the lower part 23. Said means for varying the width of the slot 24 consists of the cylindrical clutch-slide 60, hereinbefore referred to. (Illustrated in detail in Fig'. 17, in elevation in Fig. 12, and in section in Figs. 4 and 7.) Said clutch-slide consists ot' a cylindrical n sleeve portion T8, arranged to slide in a plate 79, fast to the camera-casing 2O and extending' therethrough. Outside the caslng'sald cylin- IOO tuting a spline, by which the spur-gear 84 and the tape-reel 85 are rotated upon rotation of the thumb-disk 8O and clutch-slide 60, as seen in Figs. 4, 12, and 7.

The spur-g'ear 84 meshes into a pinion-gear 86, formed upon the left-hand end of the pinion-gear shaft 87, said pinion-gear shaft being arranged to rotate in bearings formed in the clutch-disk 83, the disk 58, and the disk 52, and having another pinion-gear 88 formed upon the right-hand end thereof, Fig. 4. The

vpiniongear 88 meshes into a spur-gear 89,

said spur-gear 89 being arranged to rotate upon the sleeve 53 at the right of Fig. 4 and having fastened thereto another tape-reel 90. The clutch-slide 60 is provided with an annular groove 121 in its periphery, into which a locking-slide 122 projects. Said locking-slide is constructed to slide in ways 123, formed in the plate 79, and its held upwardly7 and into the groove 121 by a spring 124, the object of this lock being to prevent the clutch-slide from being moved longitudinally thereof at all times except when the locking-rod 77 projects into the hole 76 in the intermittent stopgear 55. The locking-rod 77 has a collar 125 fast thereto, said collar being provided with beveled ends, and when the locking-rod 77 is out of engagement with said intermittent stopgear the lower end of the locking-slide 122 bears upon the periphery of said collar 125. When, however, the hole 76 in the intermittent gear comes in alinement with the rod 77, as hereinbefore described, the spring 116, carrying said rod, the rod carries the collar 125 to the right of the slide 122, Fig. 12, and the spring 124 carries said slide downwardly and out of engagement with the clutch-slide 60. Said clutch-slide may now be drawn toward the left from the position shown in Fig. 12 until the projections 81 are withdrawn from the recesses 82 and a gear 126, fast to said clutch-slide, is brought into mesh with a gear 127, formed upon the periphery of a rotary dial 128, journaled to rotate upon a pin 129.

The rotary dial 128 is inclosed within a cover 130, which has a pin 131 projectinginwardly therefrom and across the path of rotation of a stop-pin 132, fast to said dial. Assuming now that the clutch-slide is drawn toward the left, as hereinbefore described, from the position shown in Fig. 12 to that shown in Fig. 7, upon rotation of the thumb-disk the tape-reel 85 will be rotated, and through the spur-gear 84, the pinion-gears 86 and' 88,

and spur-gear 89 the tape-reel 90 will also be rotated. Said tape-reels 85 and 90 are each provided with a tape 91 and 92, respectively, one end of each of said pieces of tape being fase tened to its respective tape-reel, the other end being fastened to one side of the lower part 23 of the curtain 21, and intermediate of the two ends of each of said pieces of tape said pieces of tape pass through eyes 93 and 94, formed in a flat strip of metal 95, fast to they lower end of the upper part 22 of the curtain 21. As seen in Figs. 13 and 9, the tapes 91 and 92 pass from the lower roll upwardly through the eyes 93 and 94, respectively, and then passing downwardly are fastened to eyes 96 and 97, formed iu a metal strip 98, fast to the free end of the lower portion 23 of the curtain 21. As the thumb-disk 8O is turned in the direction of the arrow c, Figs. 2 and 6, the tape-reels 85 and 90 will be turned in the direction of the arrow d, Fig. 9, and the tapes 91 and 92 will be paid off from said tapereels, allowing the upper curtain-roll to rotate and draw the upper portion of the curtain upwardly, increasing the width orf the slot. By turning the thumb-disk 8O in the opposite direction the width of the slot will be narrowed, the tapes 91 and 92 being wound up on the tape-reels.

Upon the face of the dial 128 are twentyfour divisions from 1 to 24, inclusive, these divisions indicating the width of the slot in the curtain as they appear through an opening 133 in the dial-cover 130. The largest numbers indicate the smallest width of slot, and vice versa. It will be seen that as the rotary dial is-rotated it will be impossible to rotate the same beyond one revolution, as the pin 132 comes in contact with the pin 131 and limits the rotation of said dial-plate to one rotation, and this prevents the tape from being entirely unwound from the tape-reel and then by continued rotation of said tape-reel in the same direction winding the same in the wrong direction4 upon said tape-reel.

1t will be seen and understood that by means of the locking-rod 77 and locking-slide 122, together with the intermittent stop-gear 55 and the hole 76, provided therein, the gear 126 is always brought into mesh with the gear 127 in such a manner that the rotary dial and the slot in the curtain maintain the same relative location. In taking time exposures it is desirable that the slot should be set in the curtain of a width substantially equal to the length of the surface to be exposed and that said slot should be instantaneously moved into position in front of the plate and also after the picture has been taken shall be instantaneously moved across the plate. To obtain-this result, I provide two slides 137 and 138, Figs. 5 and 8. These slides are arranged to slide in ways provided in the auxiliary casing 20'. The slide 137 is actuated by a lever 139, to which it is connected by a pin 139. Said lever 139 is piv- IIO oted al lx1() to said auxiliary casing' and rocked l This lo "ates the slot in the curtain in correct upon said pivot in one direction by a spiral spring' 1&1, fast to the upper end thereof, and in the opposite direction by a cam-plate 142, pivoted to a screw 143, tast to the auxiliary easing' QU, said cani-plate bearing' ag'ainst a llang'e Ml., projecting' upwardly from the lever 139, said cam-plate being' provided Yfor convenience in manipulation with a l'lang'e 14-5, projecting' upwardly therefrom.

lt will be seen that by rocking' the cam-plate 1-12 on its pivot in the direction of the arrow f, Fig'. S, the lever 139 will be moved toward the left at its lower end and toward the right at its upper end, thus carrying' the slide 13T i toward the rig'ht, Fig'. 3, and across the path ot rotation ot' the stop-tooth 34 on the intermittent stop-gear 32. Another lever 146 is connected to the slide 138 by a pin 1117 and is rocked upon its pivot 14.0 by a cam-plate 1&18, pivoted to a screw M9, 'fast to the casing' 20 and operating' substantially as hereinbei'ore described in relation to the lever 13S) to move the lower slide 138 toward the right, Fig'. S, and across the Apath ot' rotation of the stoptooth 5T upon the intermittent stop-gear lt will be understood that the slides 13T and 1218 are used to stop the curtain when the slot in the curtain is at its greatest width i'or time exposures and to stop said slot in line with the plate or film upon which the picture is to be taken.

The operation oi' setting' the curtain for time exposures is as follows: Assuming' the parts to be in the position indicated in Fig's. 7 and 13, the thumb-disk 8O is rotated, as hereinbe- Yfore described, until the divisionC 1 upon the dial comes beneath the opening'133. The top ot' the slot in the curtain will then be at the point indicated by broken and dotted lines, Fig'. 13, the bottom oi' said slot being' the top of the lower portion ol said-curtain and shown in i'ull lines. lhelock-slideis pushed toward the rig'ht, Fig'. 12. rlhe slide 134 is now pushed upwardly into the position indicated in Fig'. 11, thus withdrawing' the rod T7 from the stopg'ear The bulb is pressed, and the curtain is wound upon the upper roll with the slot lor time exposure encircling' said roll, and the camera is now in readiness to have the curtain with its time-exposure slot set to have the picture taken by time exposure. The cam-plate 14:2 is now moved, as hereinbe'lore described, rocking' the lever 139 and moving the slide 13T across the path of rotation of the tooth 3% upon the intermittentstop-gear 32. The slide 105 is now moved to its lowermost position, reversing' the respective positions of the upper and lower spindles, and the bulb pressed ag'ain, whereupon the curtain will start to move downwardly, unwinding' from the upper roll and winding' upon the lower roll until the intermittent stop-gear 32 is rotated by the intermittent pinion-gear 3l and the stop-tooth 34: comes in contact with the stop-slide 137.

position in vfront of the ['ilm or plate i'or a pietm'e to be taken. Finally after the plate has been suiliciently exposed the slide 13T is removed i'rom the path of rotation o'l the stoptooth 3a and the bulb pressed again, whereupon the curtain is wound upon the lower roll, together with the full extent ot the slot in said curtain.

Having' thus described my invention, what l claim, and desire by Letters Patent to secure, is4

1. 1n a photographic shutter, a slotted curtain, a pair of rotary rolls attached thereto, a pair of rotary spindles upon which said rolls are mounted, means to rotate said rolls, means to lock each oi' said spindles to its respective roll, means to lock each oi' said spindles against rotation, a gear vtast to each ot' said spindles, a slide constructed to slide in ways upon the casing' of said camera, and a winding-gear rotatably mounted upon said slide and constructed to be moved into and ont or' engagement alternately with said gears.

2. In a photographic shutter, a slotted curtain, a pair of rotary rolls attached thereto, a pair ot' rotary spindles upon which said rolls are mounted, said spindles movable l e ngitudinally thereof, a clutch upon each ot' said spindles, said clutches operating' to lock said spindles to said rolls by moving' said spindles longitudinally thereof in one direction and to unlock said spindles from said rolls by moving' said spindles longitudinally thereof in the opposite direction, a lever connected to said spindles, and a slide constructed to slide in ways upon the casing' oi' said camera, and operating' to rock said lever and simultaneously move said spindles in opposite directions.

3. In a photographic shutter, a slotted cm'- tain, a pair of rotary rolls attached thereto, a pair of rotary spindles upon which said rolls are mounted, said spindles movable longitudinally thereof, a clutch upon each of said spindles, said clutches operating' to lock said spindles to said rolls by moving said spindles longitudinally thereof in one direction and to unlock said spindles 'from said rolls by moving' said spindles longitudinally thereof in the opposite direction, a lever connected to said spindles, a g'ear fast to each ot' said spindles, a slide constructed to slide in ways upon the casing' of said can'iera and operating' to rock said lever and simultaneously move said spindles in opposite directions, and a winding-gear rotatably mounted upon said slide and constructed to be moved'into and out ot engagement alternately with said gears.

4. In a photographic shutter, a slotted cm'- tain, a pair of rotary rolls attached thereto, a pair of rotary spindles upon which said rolls are mounted, said spindles movable longitudinally thereof, a clutch upon each oln said spindles, said clutches operating to locli said spindles to said rolls by moving' said spindles lonlOO IIO

giludi nally thereof in one direction and to unlock said spindles from said rolls by moving said spindles longitudinally thereof in the opposite direction, a lever connected to said spindles and operating to simultaneously move them in opposite directions, a ratchet fast to each of said spindles, a pair of stop-pawls, each engaging its respective ratchet, mean to alternately disengage said pawls from said ratchets, a gear fast to each of said spindles, a slide constructed to slide in ways upon the casing of said camera and operating to rock said lever and simultaneously move said spindles in opposite directions, and a winding-gear rotatably mounted upon said slide and constructed to be moved into and out of engagement alternately with said gears.

5. In a photographic shutter, a slotted curtain, a pair of rotary rolls attached thereto, a pair of rotary spindles upon which said rolls are mounted, said spindles movable longitudinally thereof, a clutch upon each of said spindles, said clutches operating to lock said spindles to said rolls by moving' said spindles longitudinally thereof in one direction and to unlock said spindles from said rolls by moving said spindles longitudinally thereof in the opposite direction, a lever connected to said spindles and operating to simultaneously move them in opposite directions, aratchet fast to each of said spindles, a pair of stop-pawls each engaging its respective ratchet, a pair of pneumatic pistons, means to alternately reciprocate said pneumatic pistons and alternately disengage said pawls from said ratchets, a gear fast to each of said spindles, a slide constructed to slide in ways upon the casing of said camera and operating to rock said lever and simultaneously move said spindles in opposite directions, and a winding-gear rotatably mounted upon said slide and constructed to be moved into and out of engagement alternately1 with said gears.

6. In a photographic shutter, a slotted curtain, a pair of rotary rolls attached thereto, a pair of rotary spindles upon which said rolls are mounted, said spindles movable longitudinally thereof, a clutch upon each of said spindles, said clutches operating' to lock said spindles to said rolls by moving said spindles longitudinally thereof in one direction and to unlock said spindles from said rolls by moving said spindles longitudinally thereof in the opposite direction, a lever connected to said spindles and operating' to simultaneously move them in opposite directions, a ratchet fast to each of said spindles, a pair of stop-pawls each engagingits respective ratchet, a pair of pneumatic pistons, means to reciprocate said pistons and disengage said pawls from said ratchets, a pair of stops upon said lever arranged to alternately cross the line of motion of said pistons for the purpose specified, a gear fast to each of said spindles, a slide constructed to slide in ways upon the casing of said camera and operating' to rock said lever and simultaneously move said spindles in opposite directions, and a winding-gear rotatably mounted upon said slide and constructed to be moved into and out of engagement alternately with said gears.

7. In a photographic shutter, a pair of rotary rolls, a curtain in two parts provided with a slot between said parts, each of said parts fast to its respective roll, means to lock one of said rolls against rotation, means to rotate the other of said rolls from the outsideof said casing and vary the width of said slot, a rotary dial, and means to operatively connect said dial to one of the parts of said curtain.

8. 1n a photographic shutter, a pair of rotary rolls, a curtain in two parts provided with a slot between said parts, each of said parts fast to its respective roll, means to lock one of said rolls against rotation, means to rotate the other of said rolls from the outside of said casing and vary the width of said slot, a rotary dial, and means tooperatively connect said dial to one of the parts of said curtain and to disconnect said dial therefrom.

9. In a photographic shutter, a casing, a pair of rotary rolls, a pair of rotary spindles upon which said rolls are mounted, means to rotate said rolls, means to lock each of said spindles to its respective roll and means to lock each of said spindles against rotation; in combination with a curtain in two parts, provided with a slot between said parts, each of said parts fast to its respective roll, a tapereel journaled upon one of said spindles at the end of one of said rolls, means to lock said tape-reel to said roll and unlock said tape-reel from said roll,a rotary dial, and means to rotatably connect and disconnect said roll and dial.

10. In a photographic shutter, a casing, a pair of rotary rolls, a pair of rotary spindles upon which said rolls are mounted, means to rotate said rolls, means to lock each of said spindles to its respective roll, and means to lock each of said spindles against rotation; in combination with a curtain in two parts, provided with a slot between said parts, each of said parts fast to its respective roll, a tapereel journaled upon one of said spindles at one end of one of said rolls, a clutch movable longitudinally of said spindle to lock said tapereel to said roll, said clutch extending through said casing, a rotary dial-gear, a gear fast to said clutch and constructed to mesh into said dial-gear when said tape-reel is unlocked from said roll.

l1. In a photographic shutter, a casing, a rotary curtain-roll, a slotted curtain, one end of said curtain fast to said roll, means to lock said roll against rotation, a spindle upon which said roll is journaled, a tape-reel journaled upon said spindle at one end of said roll, a disk fast to said roll and provided with depressions, a clutch movable longitudinally of .IOO

IIO

said spindle to engage said depressions and lock said tape-reel to said roll and to unlock said tape-reel from said roll when withdrawn from said depressions, said clutch extending through said casing, a rotary dial-gear, and a gear tast to said clutch and constructed to mesh into said dial-gear when said tape-reel is unlocked from said roll.

1Q. In a 11 hotographie shutter, a casing, a rotary curtain-roll, a slotted curtain, one end of said curtain fast to said roll, means to lock said roll against rotation, a spindle upon which said roll is journaled, a pair of tape-reels journaled upon said spindle, one at each end of said roll, a gear tast to each of said tape-reels, a pinion-shaft journaled within said roll, a pinion at each end of said pinion-shaft intermeshing said gears, and a clutch movable lengthwise ot' said shaft splined to one of said tape-reels and extending through said casing, a rotary dial-gear, a gear fast to said clutch and constructed to mesh into said dial-gear when said tape-reel is unlocked from said roll.

13. In a photographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a gear t'ast to said spindle, a stop-gear journaled to rotate upon said casing and meshing into said gear, and a locking-rod constructed to engage said stop-gear and lock the same against rotation, and a spring acting to move said rod into engagement with said stop-gear.

14. In a photographic camera, a easing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a gear fast to said spindle, a stop-gear journaled to rotate upon said casing and meshing' into said gear, a locking-rod constructed to engage said stop-gear and lock the same against rotation, and means to hold said rod out or' engagement with said stop-gear.

l5. In a photographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a tapereel journaled upon said spindle at one end of said roll, a clutch movable longitudinall)Y of said spindle and constructed to lock said tapereel to said roll and to unlock said tape-reel therefrom, and means to lock said clutch against longitudinal movement.

1G. In a photographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a tapereel journaled upon said spindle at one end o't' said roll, a clutch movable longitudinally of said spindle and constructed to lock said tapereel to said roll and to unlock said tape-reel therefrom, means to lock said clutch against longitudinal movement, a rotary dial-gear, and a gear fast to said clutch and constructed to be moved into and out of engagement with said dial-gear.

17. Aln a photographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a gear tastto` said spindle, a stop-gear iournaled to rotate upon said easing and. meshing into said gear, a locking-rod constructed to engage said stop-gear and lock the same against rotation` a tape-reel journaled upon said spindle, at one end of said roll, a clutch movable longitudinally o't' said spindle and constructed to lock said tape-reel to said roll and to unlock said tape-reel therefrom,

18. In a i'ihotographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a gear fast to said spindle, a stop-gear journaled to rotate upon said casing and meshing into said gear, a locking-rod constructed to engage said stop-gear and lock the same against rotation` a tape-reel journaled upon said spindle, at one end ot said roll, a clutch movable longitudinally of' said spindle and constructed to lock said tape-reel to said roll and to unlock said tape-reel therefrom, and means to lock said clutch against longitudinal movement.

19. In a photographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a gear fast to said spindle, a stop-gear journaled to rotate upon said casing and meshing into said gear, a locking-rod constructed to engage said stop-gear and lock the same against rotation, a tape-reel journaled upon said spindle, at one end or' said roll, a clutch movable longitudinally ol said spindle and constructed to lock said tape-reel to said roll and to unlock said tape-reel therefrom, and means controlled by said locking-rod to lock said clutch against longitudinal movement.

20. In a photographie camera, a easing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a tapereel journaled upon said spindle at one end ot said roll, a rotary dial journaled upon said casing and rotatably connected to said reel, and a stop constructed to limit the rotation ot' said dial.

2l. In a photographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a gear fast to said spindle, a stop-gear journaled to rotate upon said casing and meshing into said gear, a locking-slide constructed to engage said stop-gear and lock the same against rotation and i'nechanism to throw said slide into and out of engagement with said stop-gear.

22. In a photographic camera, a casing, a slotted curtain, a roll attached thereto, a spindle upon which said roll is mounted, a gear fast to said spindle, a stop-gear journaled to rotate upon said casing and meshing' into said gear, a locking-slide constructed to engage said stop-gear and lock the same against rotation and a lever engaging said slide and adapted to move the name into and out of engagement with said stop-gear.

29. In a photographic shutter, a casing, a Slotted curtain, a pair of rotary rolls attached IOO IZO

ISO

same against rotation, and mechanism to throw said slides into and out of engagement with their respective stop-gears. l I

In testimony whereof I have hereunto setA 15 my hand in presence of two subscribing witnesses.

JOHN S. WRIGHT.

Witnesses:

CHARLES S. GOODING, ANNIE J. DAILEY. 

